Operator 13 (1934) Marion Davies, Gary Cooper, Jean Parker

At the start of the Civil War, the Union sends actresses Gail Loveless (Marion Davies) and Pauline Cushman (Katharine Alexander) to infiltrate the Confederacy. Disguised as her black servant, Gail helps Pauline gather intelligence about Capt. Jack Gailliard (Gary Cooper). But when Pauline is imprisoned under suspicion of espionage, it’s up to Gail to complete her mission. Refashioned as a Southern belle, Gail is able to get close to Gailliard — but finds herself falling in love.